Checkbox Not Working?

Hello there,

I created a form with a checkbox as a required field, with only one option “yes” for it. When I fill out the form and it is selected, when I go to submit the form, it says:
“Select atleast one checkbox”
even though it is selected…

Strangely enough, if I use a radio button instead with the exact same option of only “yes,” the form goes through fine.

However, I need the checkbox option to work as that is what the client is requesting.

Any idea why it might not be working?

Thank you,